Irradiation is used in diagnostic imaging, cancer therapy and blood transfusion. In 2011 researchers found that irradiation was successful in the novel theranostic technique involving co-treatment with heptamethine dyes to elucidate tumor cells and attenuate their growth with minimal side effects.
Water is potable when it is safe for drinking by humans and other animals. Rainwater and even seawater can be processed into potable drinking water at a water filtration plant. Minute amounts of bleach can be added to water to purify it. Campers might use purification tablets to make small amounts of potable water.
Will usually say on label: Potable. A pressure vessel should be connected to the pipework close to the pump and before a pressure reducing valve. An expansion tank is usually not filled with water, it's air charge pressure is set about 10% above maximum expected pressure.